Artificial stone.



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' collide' 'o'aiAsnc MICHAEL EBINGER, F OAKLAND, CALIFORNIA.

ARTIFICIAL STONE.

Specification of Letters Patent.

Patented Apr. 15, 1919.

i' Application led November 15, 1916. Serial No. 131,573.

To all whom t may concern.'

Be it known that I, MICHAEL EBINGER, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Artificial Stone, of which the following is a specification.

The invention relates to improvements m artificial stone and more particularly to a product of thischaracter specially adapted for the drain boards of sinks, for the fioors of bath rooms and showers, and in general for places where an impervious, hard, elegant looki material is desirable.

The principal object of my invention is to produce an artclal stone whlch 1s nonporous and is therefore adapted for use 1n places where it will be exposed to water.

Another object of the invention 1s to produce a stone which can be laid in the plast1c state and which will be hard and strong, when set, without being brittle. Still further objects of the invention are to produce an artificial stone which is pleasing in appearance and which is capable of talnng a high finish.

With these and other objects in v1ew the invention consists in the novel combination of materials herein described and more Specifically pointed out in the appended claims.

Reference being had to the drawing forming a part of this specification, the gure is a view in plan of a piece of Stone constructed in accordance with my invention.

Referringto the various parts on the drawing by numerals of reference the improved stone consists of oieces of crus ed ranite denoted by 2, an ieces o crus e uar z denoted by 3. Thepieces il are here sliown Black in color and I find this color gives a pleasing effect when used with pieces 3 of clear or milky quartz, the amount of each being substantially the same. While I have shown half of the particles black and the other half clear, it will be understood that the principal object is to have them of contrasting colors.

' All the particles are crushed to a ineness that will pass through a screen having a mesh of about eight to the inch.

The cementitious material is Portland cement either the ordinary gray variety or one' wh ich gives a substantially white color when part f5 three or four parts agggegates, the

' cement, water-proofing and co orlng matter being first mixed in the dry state are then added to the aggregates and the whole moistened to the proper degree. This plastic mass is applied to the surface and carefully trowled into a compact mass. After it has set the surface is finished by rubbing with a coarse abrasive such as carborundum until a smooth' glossy surface is produced.

The granite used is mostly black quartz and transparent feldspar, vwhile the quartz is of the milky or transparent Variety. Thus the aggregates when rubbed down show a mottled effect, and take a high polish.

Thus by my improved artificial stone, I obtain a surface which is impervious to water, which is pleasing in tone, and which is capable of taking a high polish. While I have described the preferred embodiment of my invention, it will be understood` that changes may be made in proportions of the ingredients without departing from the scope of the claims.

I claim as new and wish to cover by Letters Patent:

1. An artificial stone comprising crushed crystals of two contrasting shades in substantially equal parts, a light colored cementitious compound, and stearate of lime.

2. An artificial stone comprising finely crushed crystals of two contrasting colors in substantially equal parts, a light colored 10 Portland cement, a coloring compound, and stearate of lime.

In testimony whereof I affix my signature.

MICHAEL EBINGER.

Copies of this patent may be obtained for nve cents each, by addressing the Commissioner *t Patents,

Washington, D. G. 

